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Posts by Stephanie Alt

Older soil test methods hold ground

Current widely used soil test methods have come out on top in a review of soil testing procedures to see which procedures best correlate with crop yield responses. Sean Mason at the University of Adelaide has investigated how well results from some newer testing methods, including Diffusion Gradient Testing (DGT), […]

Using Potassium to put more profit on the bottom line

Potassium nutrition is a key part of crop agronomy. Under the GRDC’s More Profit from Crop Nutrition program, Professor Richard Bell from Murdoch University and collaborators investigated Potassium (K) nutrition in Western Australia; to help growers and advisors better understand crop responses to K inputs in different situations. A free […]

Opportunities to optimise fertiliser investment – Parkes NSW

Fertiliser is a key component of crop input budgets. Key messages from the GRDC’s More Profit from Crop Nutrition (MPCN) initiative will be shared at workshop at Parkes NSW on March 9. Industry experts on soil and crop nutrition issues will present recent findings and discuss opportunities to optimise fertiliser […]

Reducing Nitrogen losses in the High Rainfall Zone of Victoria

Strategies to reduce Nitrogen (N) losses in Victorian High Rainfall Zone (HRZ) cropping systems are getting clearer. Recent research in south western Victoria examined rates of N applied, placement of fertilisers and nitrification inhibitors. This work is part of the national agricultural nitrous oxide research program, supported by the GRDC. […]

Webinar – get more profit from nitrogen with price ratios

A free, online webinar to explain the concept of an economically optimum nitrogen rate. The optimum is derived using a ratio of the price of wheat to the price of nitrogen. This framework can help growers and advisors achieve better returns on nitrogen expenditure when used in conjunction with N […]

Soil test deeper to predict response to Potassium fertiliser

Soil testing only the top 0 – 10cm of soil is not sufficient to predict if applying Potassium fertiliser will produce a yield response in a crop. The 0-10cm zone has traditionally been the most common type of soil sample to base fertiliser recommendations on. The roots of crop plants […]

Research Updates 2016

The GRDC Research Updates for 2016 commenced last week, continuing around the country until mid March. eXtensionAUS Crop Nutrition Community of Practice members James Easton, Liam Ryan, Craig Scanlon, Graeme Schwenke, Nigel Wilhelm and Tony Cox (manager of More Profit from Crop Nutrition) are among those presenting at these GRDC […]

Potassium and crop stress

Crops may need extra Potassium when they under stress from drought or frost. There is a theoretical basis, and now GRDC funded research is looking into whether applying additional potassium is worthwhile when plants are under stress. Getting the right combination of drought and frost conditions to get meaningful results […]

Using deep soil cores for Nitrogen, Potassium & Sulfur

Soil testing is a valuable tool for crop nutrition decision making. The standard 0 – 10cm soil test doesn’t always tell us enough about the crop availability of more mobile nutrients. Nitrogen and Sulphur, as anions (negatively charged), tend to move deeper into the profile with rainfall. On sandy acid […]

Subsoil manuring provides long term N supply

Some growers have been able to reduce N inputs for at least three years following the placement of manure into the subsoil. Trials in Victoria’s High Rainfall Zone by Southern Farming Systems are showing promising signs of multiple benefits from subsoil manuring. Originally, subsoil manuring was primarily for improving the […]

Top 10 crop nutrition articles 2015

During 2015 eXtensionAUS Crop Nutrition published 43 articles on many different aspects of crop nutrition in the Australian grains industry. All of these articles were prepared with, and reviewed by, members of our Community of Practice, Australia’s leading experts in crop nutrition. These are our top ten – the most popular […]

RESEARCH SPOTLIGHT: Fertiliser recommendations and soil tests

Surveys have indicated soil testing is underutilised in Australia for developing paddock or site specific fertiliser applications. Soil testing provides a seasonal index of the nutrients present in soil and helps inform decisions on the right types, methods and rates of fertiliser to meet crop requirements. The process for developing […]